Rock-arm lifter



N. L. GRAVES.

ROCK ARM LIFTER.

APPLICATION FILED 0019,1919.

1,356,979. Patented Oct. 26,1920.

UNITED, s ATssY' NORMAN L. canvas, or winnms'ron, DELAWARE; f

ROCK-ARM LIFTER.

Specification of Letters mm. Patented Oct. 26,1920.

Application filed October 9, 1919. Serial no. 329,594.

To all whom it may concern:

Be it known that I, NORMAN L. GRAVES, a citizen of the United States, residing at Wilmington, in the county of New Castle and a rocker arm lifter, peculiarly adapted to automobile gas engines of the over-head valvetype wherein a rocker arm forms the means for actuating the valve, the arm itself being actuated by a valve rod, the device be ing particularly adapted for use with the well known Buick engines.

One important object of the invention is to provide a tool whereby the rocker arm in such engines may be tilted easily against the action of the valve spring and thus enable the valve rod to be connected or disconnected.

A second important object of the invention is to provide a device of this description wherein certain of the parts can be'so adjusted as to permit the device to be used on various sizes of rocker arms.

With the above and other objects in view, as will be hereinafter apparent, the inven tion consists in general of certain novel details of construction and combinations of parts hereinafter fully described, illustrated in the accompanying drawings and specifically claimed.

In the accompanying drawings, like char acters of reference indicate like parts in the several views, and:

Figure 1 is a side elevation showing the manner of applying the tool to a rocker arm,

Fig. 2 is a bottom plan View of the front end of the device, a

Fig. 3 is an enlarged sideelevation of the device partly in section,

Fig. 4: is a section on the line 4-4 of Fig. 3.

In the drawings, there is shown in Fig. 1, the top portion A of an engine cylinder,

whereon is located a bracket or support B,

carrying a rocker arm C. One end of this arm bears against a valve stem D to actuate the valve (not shown) while, to the other end, is normally'connected a valve rod E,

' here shown in its disconnected position.

The tool forming this invention consists of a bar or lever 10 having at one end a down turned fork 11, the other end being preferably provided with a handle 12. Also, it is preferred that the bar 10 be made in telescopic sections, as shown in Figs. 1 to 4, the forward section being a rod while the rear or handle section is a tube. In. such case, the tube is provided with a slot 13, wherethrough passes the stem of a thumb screw 14, screwed into the rod and arranged, when screwed down, to clamp the parts in adjusted position. Surrounding the sleeve portion of the bar is a co1lar'15, whereto are pivoted the sister hooks 16, normally held open by the spring 17. At 18 is a second collar whereto is pivoted a lever 19, having at its forward end, a fork 20, the arms whereof,

embrace the sister hooks so that movement of the handle 21 of said lever toward the handle 12 effects closing of said hooks, such movement being limited by a stop 22 and movement in the opposite direction to per.

mit pressing of the hooks, being effected by a spring 23, as shown.

In operation, the fork 11 is rested on the end of the rocker C near the valve stem D and the hook or hooks engaged beneath the rocker arm near, the end of said arm, adjacent the valve rod E, the engagement of the parts being thus on opposite sides of the fulcrum of said arm. Then, by raising the handle 12, the rocker arm may be tilted and the valve rod readily disconnected or connected, as the case may be.

There has been thus provided a simple and efficient device of the kind described and for the purpose specified. V

It is obvious that changes maybe made in the form and proportions of the parts without departing from the principles involved. It is not, therefore, desired to confine theinvention to the exact form herein shown and described, but it is wished to in. clude all such as come within the scope claimed.

Having thus described the invention, what I claim as new, is:

1. In a tool of the class described, abar forming a lever, a fork at one end thereof, sister hooks pivotally supported intermediate the ends of said bar, means normally holding said hooks open, and other means to close said hooks against the action of the first mentioned means.

2. In a tool of the class described, a bar forming a lever and provided With a doWn turned fork at one end sister hooks pivotally supported from the bar intermediate the ends thereof, a spring normally holding; said hooks open an operating lever pivoted to the first lever and having one end forked and embracing said hooks whereby to close the hooks upon movement of said operating lever in one direction, said bar and lever having handle ends adjacent each other, and a 10 spring urging said handle ends apart.

In testimony whereof I afliX my signature.

NORMAN L. GRAVES. 

